| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 66°F | 52°F | 1.2" |
| February | 44°F | 72°F | 56°F | 1.8" |
| March | 52°F | 78°F | 64°F | 2.0" |
| April | 59°F | 85°F | 71°F | 3.3" |
| May | 66°F | 90°F | 77°F | 8.6" |
| June | 72°F | 95°F | 83°F | 2.3" |
| July | 73°F | 96°F | 84°F | 1.9" |
| August | 74°F | 98°F | 85°F | 2.7" |
| September | 69°F | 92°F | 79°F | 4.8" |
| October | 60°F | 85°F | 71°F | 1.9" |
| November | 51°F | 74°F | 61°F | 2.0" |
| December | 43°F | 66°F | 53°F | 1.2" |
| Index | Knippa | Texas | National |
| Air quality index | 25 | 52 | 42 |
| Pollution index | 683,072 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 339 |
| Days with good air quality | 287 |
| Days with moderate air quality | 51 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Uvalde, TX | 16,122 | 25 | 50.0% |
| Uvalde Estates, TX | 2,033 | 25 | 50.0% |
| Sabinal, TX | 1,061 | 49 | 2.0% |
| Knippa, TX | 900 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Winslow, IN | 900 | 6 | 88.0% |
| Logan, KS | 900 | 19 | 62.0% |
| Chevy Chase Section Three, MD | 900 | 47 | 6.0% |
| Westbrook, MN | 900 | 32 | 36.0% |
| Rushville, NE | 900 | 19 | 62.0% |
| Knippa, TX | 900 | 25 | 50.0% |
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